tiff: New overflows in image decoding
— GLSA 200501-06

An integer overflow has been found in the TIFF library image decoding
routines and the tiffdump utility, potentially allowing arbitrary code
execution.

Affected Packages

Package

media-libs/tiff on all architectures

Affected versions

< 3.7.1-r1

Unaffected versions

>= 3.7.1-r1

Background

The TIFF library contains encoding and decoding routines for the
Tag Image File Format. It is called by numerous programs, including
GNOME and KDE applications, to interpret TIFF images.

Description

infamous41md found a potential integer overflow in the directory
entry count routines of the TIFF library (CAN-2004-1308). Dmitry V.
Levin found another similar issue in the tiffdump utility
(CAN-2004-1183).

Impact

A remote attacker could entice a user to view a carefully crafted
TIFF image file, which would potentially lead to execution of arbitrary
code with the rights of the user viewing the image. This affects any
program that makes use of the TIFF library, including many web browsers
or mail readers.